Oranos VS Isis - How do I stop a Siege Tower Bulldozer?

I played against the same Isis player twice in a row and he practically cost me half my rank. Both times I beat him to the Classical Age, looped Turma but then he beats me to Heroic and steamrolls my ass with more Siege Towers and Camels than I can ever keep up with. I struggle to advance to Heroic myself because I have to keep producing units to keep him at bay.

I tried to take out the Siege Towers with Murmillo, but he rolled over them with a ton of Chariots. I tried to take the Chariots out with my Turma but he rolls over them with Camels. Etc, etc. When I do get to Heroic and get the Birds out, his Priests and Chariots take them out.

Siege Towers are one of the most annoying pieces of shit in this game, how the hell do I deal with this bullshit?